Device and controlling method for displaying stationary/dynamic status of car

Abstract

Device for displaying stationary/dynamic status of a car for assuring safety including a car stationary/dynamic state sensing part for detecting a change of speed of a predetermined time period sensed by a rotating slit plate mounted on a speed meter cable connecting device and a photo interrupter; a pulse generating part for converting an analog signal from the state sensing part into digital pulses and applying to an microcomputer; the microcomputer for reading in a driving data programmed in a built-in ROM in response to a signal from the pulse generating part and applying driving pulses to a relevant output port; a red LED operating part and a green LED operating part for turning on respective LEDs in a red LED array part and a green LED array part in response to the microcomputer operation output, thereby running states of car can be expressed in stationary/dynamic states of stop, slow running, acceleration, equal speed running, deceleration and reversing under the control of a microcomputer.

What is claimed is: 
     
       1. A device for displaying stationary/dynamic status of a car comprising: a car stationary/dynamic state sensing part for detecting a change of speed for a period of time sensed by a rotating slit plate mounted on a speed meter cable connecting device and a photo interrupter, such that as the speed meter cable connecting device operates, the rotating slit plate is rotated and the photo interrupter detects an analog signal corresponding to a number of slits passed through the photo interrupter;   a pulse generating part for converting the analog signal from the state sensing part into digital pulses;   a reverse switching part connected to a positive terminal on a reversing lamp for switching an interrupt signal when a transmission lever is put to a reversing position;   a microcomputer for reading in a driving data programmed in a ROM in response to pulses from the pulse generating part and applying driving pulses to a relevant output terminal;   a power on reset circuit part for applying a reset signal to a reset terminal for initializing the microcomputer;   an oscillating part for providing a system clock signal to the microcomputer;   a car stationary/dynamic state displaying part having a red LED operating part and a green LED operating part for turning on relevant LEDs in a red LED array part and a green LED array part in response to the microcomputer operation output;   the red LED array part and the green LED array part being turned on by the operating output from the operating parts;   a constant voltage supplying device for supplying a constant voltage according to a switching operation; and,   a connecting part for connecting a power supplying part which supplies car battery power to a main switch part and a reverse lamp voltage reception terminal for operating the reverse switching part wherein running states of the car can be displayed in stationary/dynamic states of stop, slow running, acceleration, equal speed running, deceleration and reversing.   
     
     
       2. A device as claimed in claim 1, wherein the pulse generating part includes an inverter for converting an analog signal detected in the car stationary/dynamic state sensing part to digital pulses. 
     
     
       3. A device as claimed in claim 1, wherein the speed meter cable connecting device which is the car stationary/dynamic state sensing device, is fixed to a connector for connecting a transmission gear output shaft and a speed meter cable of the speed meter by means of a speed meter cable inner shaft coupling having an identical shape with a speed meter cable inner shaft and a sleeve joint having a female thread identical to a thread in the speed meter cable, and, at a rear of the speed meter cable connecting device, fixed by connecting the speed meter cable inner shaft and the speed meter cable female thread to the speed meter cable inner shaft coupling having identical shape to a recess in a transmission gear output shaft gear part and the sleeve joint having a male thread having an identical shape to the connector for connecting a transmission gear output shaft and a speed meter cable on a speed meter, whereby a driving force on the output shaft of the transmission gear is transmitted to the speed meter on the gauge panel and an identical number of revolutions is obtained. 
     
     
       4. A device as claimed in claim 1, wherein the speed meter cable connecting device of the car stationary/dynamic state sensing part includes a rotating slit plate with a plurality of slits on a center portion of a connecting rod therein, and both ends thereof locker or anchor shaped for connecting with a car body. 
     
     
       5. A device as claimed in claim 1, wherein a sensitivity of a state of slow running, acceleration, equal speed running and deceleration displayed on the car stationary/dynamic status displaying part can be adjusted by adjusting a number of the slits in the rotating slit plate. 
     
     
       6. A device as claimed in claim 1, wherein, when the transmission lever is put to a reversing position, the reverse switching part makes the microcomputer to understand the reversing by operating the switching part by applying a dc current for the turned on reversing lamp thereto and applying the interrupt signal generated according to the operation of the switching part to the microcomputer. 
     
     
       7. A device as claimed in claim 1, wherein each of the red LED operating part and the green LED operating part includes string resistors connected to an output terminal on the microcomputer, string transistors each connected to a terminal on one of the string resistors and another set of string resistors. 
     
     
       8. A device as claimed in claim 1, wherein each of the red and green LED array parts includes a plurality of LEDs arranged in a row of a first stage to a last stage, thereby the entire LEDs are turned on starting from the first stage and extends the stages to the right and left directions depending on a rate of speed change and duration of a state. 
     
     
       9. A device as claimed in claim 1, wherein a sensitivity of a state of slow running, acceleration, deceleration and equal speed running displayed on the car stationary/dynamic state displaying part can be adjusted by measuring pulses in one operation cycle generated through the pulse generating part in the car stationary/dynamic state device by setting one time operation cycle of the microcomputer. 
     
     
       10. A device as claimed in claim 9, wherein the displaying part of the stationary/dynamic status displaying device is provided so that red color is used for expression of stop, deceleration, slow running and reversing, and green, or blue color is used for expression of acceleration, and the array parts include LEDs or lamps. 
     
     
       11. A controlling method for displaying stationary/dynamic status of a car comprising the steps of: (1) initializing an microcomputer for initializing a timer and a counter at the same time upon turning on a switch in a main switch part, and repeating measurement of pulses generated in a pulse generating part of a car stationary/dynamic state sensing part by means of the timer for stopping the timer and counter if the pulses are sensed within a reference duration and initializing a time constant of the timer and initializing the counter if the pulses are not sensed within the reference duration;   (2) turning on an entire red LED display part and turning off an entire green LED displaying part if a counted value after the stop of the counter in the (1) step is understood to be stop or slow running, and subtracting a counted value stored in a memory from the present counted value which represents a speed of the car at the present time if the counted value exceeds a value that represents stop or slow running, to calculate a number of pulses at the present time;   (3) if the microcomputer understands that the car is at an equal speed running from the pulses calculated in the (2) step, turning both the entire red LEDs and the entire green LEDs off, and jumping to a step for determining acceleration/deceleration from the pulse calculated value if the pulse calculated value indicates a speed change;   (4) turning the entire red LED off and, at the same time, turning the green LED on according to a rate of acceleration if the calculated value is understood to represent an acceleration in the (3) step, and turning the entire green LED off and, at the same time, turning the red LED on according to a rate of the deceleration if the calculated value is understood to be deceleration; and,   (5) repeating the (1)˜(4) steps for turning the luminance LEDs in the red, and green LED displaying parts, wherein each of the red and green LED display parts includes a plurality of LEDs arranged in a row of a first stage to a last stage, by shifting the turned-on LEDs with time lag starting from a first stage in the middle and extending the stages to the right and left, according to rate and duration of each state of stop, slow running, acceleration, equal speed running, deceleration.   
     
     
       12. A method as claimed in claim 11, wherein a state of display of a car running state displayed on a displaying device of the red and green LED array parts by currents from red and green LED operating parts amplified under the control of the microcomputer, is flashing which is repetition of turning on/off of the entire LEDs in the red LED displaying part with predetermined time differences at reversing of the car,   turning on the entire LEDs in the red LED displaying part and maintaining the turning on state for the duration of the stop at stop of the car,   turning on the entire LEDs in the red LED displaying part and maintaining the turning on state until a speed of the slow running of the car is exceeded at slow running of the car,   simultaneous turning on of one stage or many stages of the green LED displaying part depending on a rate of an acceleration and shifting on adding one or more stages of the LEDs to a prior turned on stage according to a duration of the acceleration to add up the turned on stages at acceleration of the car,   simultaneous turning on of one stage or many stages of the red LED displaying part depending on a rate of a deceleration and shifting on adding one or more stages of the LEDs to a prior turned on stage according to a duration of the deceleration to the turn the LEDs on up to the last stage at deceleration of the car, and   turning-off the entire LEDs in the red and green LED displaying parts to show no speed change at equal speed running of the car.   
     
     
       13. A method as claimed in claim 11, wherein the (2) step includes the steps of, storing the numbers of pulses counted at stop and slow running into the memory and initializing the time constant of the timer and the counter value, and   upon detecting a change of voltage at a pulse reception terminal on the microcomputer, activating the timer and counter, and counting pulses generated in the pulse generating part in the counter.   
     
     
       14. A method as claimed in claim 11, wherein the (3) step includes the steps of, storing the number of pulses counted at equal speed running into the memory and initializing the time constant of the timer and the counter value, and   upon detection of a voltage change at a pulse reception terminal on the microcomputer, activating the timer and counter, and counting pulses generated in the pulse generating part in the counter.   
     
     
       15. A method as claimed in claim 13, wherein the (4) step includes the steps of, storing the number of pulses counted at acceleration into the memory and initializing the time constant of the timer and the counter value, and   upon detection of a voltage change at a pulse reception terminal on the microcomputer, activating the timer and counter, and counting pulses generated in the pulse generating part in the counter.   
     
     
       16. A method as claimed in claim 11, wherein the (4) step includes the steps of, storing the number of pulses counted at deceleration into the memory and initializing the time constant of the timer and the counter value, and   upon detection of a voltage change at a pulse reception terminal on the microcomputer, activating the timer and counter, and counting pulses generated in the pulse generating part in the counter.   
     
     
       17. A method as claimed in claim 11, further comprising the steps of: (6) upon reception of an interrupt signal generated by a reverse relay switching part connected to a reverse lamp at the microcomputer, storing the (4) step into the memory, and flashing the red LED displaying part once by maintaining a state for a predetermined time, in which the entire red LEDs are turned on and the entire green LEDs turned off, and maintaining a state for a predetermined time, in which the entire red LEDs are turned off and the entire green LEDs are turned off, and   (7) after conducting the (6) step, determining finish of the reversing and repeating the (6) step until finish of the reversing.